Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2017 12 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/19/2017   06:30:01   (   0.01, -75.17) (   0.32, -76.54)  155.61                80
 12/20/2017   06:13:56   (   0.02, -75.17) (  -0.67, -72.00)  360.99                80
 12/21/2017   18:35:52   (  -0.02, -75.21) (  -0.47, -77.31)  238.83                80
 12/22/2017   18:14:27   (  -0.01, -75.21) (   0.52, -72.77)  277.79                80
 12/24/2017   06:36:14   (   0.01, -75.18) (   0.65, -78.04)  326.51                80
 12/25/2017   06:20:09   (   0.00, -75.18) (  -0.34, -73.51)  190.59                80
 12/26/2017   18:42:05   (  -0.00, -75.24) (  -0.79, -78.82)  407.97                80
 12/27/2017   18:20:39   (  -0.00, -75.24) (   0.20, -74.28)  109.27                80
 12/29/2017   06:42:27   (   0.01, -75.21) (   0.97, -79.55)  494.35                80
 12/30/2017   06:26:21   (   0.01, -75.22) (  -0.02, -75.02)   23.26                80